Below what approximate daily urine volume does the body fail to adequately clear metabolic wastes?

1. The kidneys must excrete a minimum volume of solutes daily to remove wastes like creatinine, urea, and uric acid. 2. Below a certain urine volume, this waste clearance becomes impossible even if the kidneys excrete more concentrated urine. 3. This minimum functional volume is about 0.47 liters per day. 4. 1.5 liters is the average (not minimum) daily volume, so it does not answer the question. 5. 0.15 liters and 1.0 liters are both different figures a reader might guess from memory, but neither matches the specific figure given here. 6. So 0.47 liters is the correct minimum. _Source: OpenStax Anatomy and Physiology (CC BY 4.0), Ch 26 "Fluid, Electrolyte, and Acid-Base Balance", p.1258 §Regulation of Water Output_